1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <mutex>
10 
11 // template <class Mutex> class unique_lock;
12 
13 // template <class Clock, class Duration>
14 //   bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time);
15 
16 #include <cassert>
17 #include <chrono>
18 #include <mutex>
19 #include <system_error>
20 
21 #include "checking_mutex.h"
22 #include "test_macros.h"
23 
24 int main(int, char**) {
25   typedef std::chrono::system_clock Clock;
26   checking_mutex mux;
27 
28   std::unique_lock<checking_mutex> lock(mux, std::defer_lock_t());
29 
30   assert(lock.try_lock_until(Clock::now()));
31   assert(mux.current_state == checking_mutex::locked_via_try_lock_until);
32   assert(lock.owns_lock());
33 
34 #ifndef TEST_HAS_NO_EXCEPTIONS
35   try {
36     mux.last_try = checking_mutex::none;
37     (void)lock.try_lock_until(Clock::now());
38     assert(false);
39   } catch (std::system_error& e) {
40     assert(mux.last_try == checking_mutex::none);
41     assert(e.code() == std::errc::resource_deadlock_would_occur);
42   }
43 #endif
44 
45   lock.unlock();
46   mux.reject = true;
47   assert(!lock.try_lock_until(Clock::now()));
48   assert(mux.last_try == checking_mutex::locked_via_try_lock_until);
49   assert(lock.owns_lock() == false);
50   lock.release();
51 
52 #ifndef TEST_HAS_NO_EXCEPTIONS
53   try {
54     mux.last_try = checking_mutex::none;
55     (void)lock.try_lock_until(Clock::now());
56     assert(false);
57   } catch (std::system_error& e) {
58     assert(mux.last_try == checking_mutex::none);
59     assert(e.code() == std::errc::operation_not_permitted);
60   }
61 #endif
62 
63   return 0;
64 }
65